First slide

Faraday's Laws

Question

Cost of electricity to deposit 108 grams of Aluminium is ‘X’. Cost of electricity to deposit 48 grams of Magnesium would be

Easy

A

X/3
B

X/6
C

X
D

X/2

Solution

GEW of Al = 9 g.
GEW of Mg = 12 g.
108 grams of Al can be deposited by ‘X’.
9 grams of Al can be deposited by ?
$∴$ cost of 1F of electricity = X/12.
12 grams of Magnesium can be deposited by X/12.
48 grams of Magnesium can be deposited by X/3 .

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